YAMAHA NS-670 SPEAKER 10" WOOFER DRIVER as pictured, it pulled, part# JA-2501A, in good sounding condition (tested) impedance= 8 Ohms (DCR= 5.6 Ohms) mounting hole to hole= 10 1/2 ". Since this item is highly “MISHANDLING SENSITIVE” hence it is intending for professional (whom who know it well) and this selling is final (no return or refund) Please buy or bid accordingly. Thanks for looking.